CN1974639B - Polymer electrolyte membrane for fuel cell and fuel cell system - Google Patents

Polymer electrolyte membrane for fuel cell and fuel cell system Download PDF

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CN1974639B
CN1974639B CN2006101606423A CN200610160642A CN1974639B CN 1974639 B CN1974639 B CN 1974639B CN 2006101606423 A CN2006101606423 A CN 2006101606423A CN 200610160642 A CN200610160642 A CN 200610160642A CN 1974639 B CN1974639 B CN 1974639B
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dielectric film
proton
polymer
polymer dielectric
fuel cell
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CN1974639A (en
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宋珉圭
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Samsung SDI Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
    • B01D71/06—Organic material
    • B01D71/76—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74
    • B01D71/82—Macromolecular material not specifically provided for in a single one of groups B01D71/08 - B01D71/74 characterised by the presence of specified groups, e.g. introduced by chemical after-treatment
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/20—Manufacture of shaped structures of ion-exchange resins
    • C08J5/22—Films, membranes or diaphragms
    • C08J5/2206—Films, membranes or diaphragms based on organic and/or inorganic macromolecular compounds
    • C08J5/2275—Heterogeneous membranes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
    • C08J5/20—Manufacture of shaped structures of ion-exchange resins
    • C08J5/22—Films, membranes or diaphragms
    • C08J5/2206—Films, membranes or diaphragms based on organic and/or inorganic macromolecular compounds
    • C08J5/2275—Heterogeneous membranes
    • C08J5/2281—Heterogeneous membranes fluorine containing heterogeneous membranes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/02—Details
    • H01M8/0289—Means for holding the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
    • H01M8/1018—Polymeric electrolyte materials
    • H01M8/102—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer
    • H01M8/1023—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer having only carbon, e.g. polyarylenes, polystyrenes or polybutadiene-styrenes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
    • H01M8/1018—Polymeric electrolyte materials
    • H01M8/102—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer
    • H01M8/1025—Polymeric electrolyte materials characterised by the chemical structure of the main chain of the ion-conducting polymer having only carbon and oxygen, e.g. polyethers, sulfonated polyetheretherketones [S-PEEK], sulfonated polysaccharides, sulfonated celluloses or sulfonated polyesters
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
    • H01M8/1018—Polymeric electrolyte materials
    • H01M8/1039—Polymeric electrolyte materials halogenated, e.g. sulfonated polyvinylidene fluorides
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
    • H01M8/1018—Polymeric electrolyte materials
    • H01M8/1041—Polymer electrolyte composites, mixtures or blends
    • H01M8/1044—Mixtures of polymers, of which at least one is ionically conductive
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M8/00—Fuel cells; Manufacture thereof
    • H01M8/10—Fuel cells with solid electrolytes
    • H01M8/1016—Fuel cells with solid electrolytes characterised by the electrolyte material
    • H01M8/1018—Polymeric electrolyte materials
    • H01M8/1041—Polymer electrolyte composites, mixtures or blends
    • H01M8/1046—Mixtures of at least one polymer and at least one additive
    • H01M8/1048—Ion-conducting additives, e.g. ion-conducting particles, heteropolyacids, metal phosphate or polybenzimidazole with phosphoric acid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/14—Membrane materials having negatively charged functional groups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2327/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
    • C08J2327/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
    • C08J2327/12—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
    • C08J2327/18—Homopolymers or copolymers of tetrafluoroethylene
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50—Manufacturing or production processes characterised by the final manufactured product

Abstract

A polymer electrolyte membrane for a fuel cell includes a polymer matrix comprising a cross-linked curable oligomer with nano-sized proton conductive polymer particles in the polymer matrix. The curable oligomer may include unsaturated functional groups at each end of a chain, and may further include 3 to 14 ethylene oxides. The proton conductive polymer nano particles may include fluorine-based proton conductive polymer nano particles, non-fluorine-based proton conductive polymer nano particles, hydrocarbon-based proton conductive polymer nano particles, and combinations.

Description

Fuel cell is with polymer dielectric film and fuel cell system
Technical field
The present invention relates to fuel cell with polymer dielectric film and comprise the fuel cell system of this dielectric film.
Background technology
Fuel cell is the power generation system that produces electric energy by the electrochemical redox reaction between the hydrogen in oxygenant and hydrocarbons such as methyl alcohol, ethanol or the Sweet natural gas.This fuel cell is a cleaner power sources.It comprises the battery pile that is made of elementary cell, can export the electric weight of different range.Exceed four to ten times energy density owing to having, so it receives much attention as the small portable power supply with respect to compact lithium cell.
The representative instance of fuel cell is polymer dielectric film fuel cell (PEMFC) and direct oxidation fuel cell (DOFC).The direct oxidation fuel cell of using methyl alcohol to act as a fuel is known as direct methanol fuel cell (DMFC).
The advantage of polymer dielectric film fuel cell comprises high-energy-density, but its defective that has is to handle hydrogen modestly, and need auxiliary facility as being used for the fuel reforming treater of reforming methane, methyl alcohol, Sweet natural gas etc., to produce the hydrogen gas that acts as a fuel.
On the contrary, direct oxidation fuel cell has low energy densities than polymer dielectric film fuel cell, but its advantage comprise easier fuel treatment, since low service temperature can operate and not need extra fuel reforming treater in room temperature.
In above-mentioned fuel cell system, in fact Fa Dian battery pile comprises the elementary cell of a plurality of accumulations adjacent one another are.Each elementary cell is by membrane electrode assembly (MEA) and dividing plate (being also referred to as bipolar plates).This membrane electrode assembly comprises anode (being also referred to as the fuel electrodes or the oxidation utmost point) and the negative electrode (being also referred to as the gas utmost point or the reduction utmost point) that is aggregated the separation of thing dielectric film.
Fuel is supplied anode and is adsorbed by anode catalyst, and is oxidized and produce proton and electronics at anode place fuel.Electronics is moved in the negative electrode by external circuit, and proton is moved in the negative electrode through polymer dielectric film.In addition, to negative electrode supply oxygenant, proton on negative electrode place oxygenant and cathod catalyst and electron reaction and be accompanied by the water generates electric current.
Polymer dielectric film is anode and cathode isolation, in battery operation from anode to the cathodic migration proton, and separately with gas and liquid reactants.Therefore, electrostrictive polymer subsolution plasma membrane should have excellent electrochemical stability, the low resistance loss under high current density, favorable mechanical performance and dimensional stability to the good separation performance of gas and liquid reactants and when making battery pile in battery operation.
About polymer dielectric film, the perfluorinated sulfonic acid cationoid exchange resin (trade(brand)name: NAFION of E.I.du Pont de Nemours company exploitation TM) be widely used.NAFION TMHave the hydrophobicity tetrafluoroethylene as main chain, and have the functional group that comprises the wetting ability sulfuryl at its side chain.
Commercially available NAFION TMPolymer dielectric film has more advantage than hydrocarbon polymer dielectric film, for example oxygen solvability, electrochemical stability, weather resistance etc.Because about 20% NAFION during by hydration when wherein polymer weight TMPolymer dielectric film is just understood proton conducting (sulfuryl that promptly is included in the side group is hydrolyzed into sulfonic acid), and therefore the reactant gases that is applied in the fuel cell should be by water saturation, with this dielectric film of hydration.Yet when when being higher than 100 ℃ of runnings of water boiling point, water can become dry gradually, thereby the impedance of polymer dielectric film increases, and battery performance worsens.
In addition, NAFION TMPolymer dielectric film is by extruding or solvent casting molten polymer prepares, and thickness is 50～175 microns usually.This NAFION TMPolymer dielectric film can increase or reduce to improve the dimensional stability and the mechanical property of fuel cell on thickness.Yet if thickness increases, the conductivity of polymer dielectric film can reduce; If thickness reduces, then mechanical property can worsen.
In methanol fuel cell, polymer dielectric film can allow liquid methanol fuel not react and pass through (being called methanol cross-over) when battery operation, because methyl alcohol is oxidized at negative electrode, can makes the battery performance variation, and cause waste of fuel.
Based on temperature and hydration levels, NAFION TMPolymer dielectric film also comprises hydrophobic region and hydrophilic bunch of microfacies (hydrophilic cluster).This hydrophobic region and microfacies can repeatedly expand and shrink when battery operation for hydrophilic bunch, thereby cause film thickness and volume to change about 15～20%.Therefore, for thin dielectric film, the interface performance between dimensional stability and electrode and ionogen may variation.
Summary of the invention
One embodiment of the invention provide a kind of polymer dielectric film, and it has the strength property of raising, good conductivity and the economy of improvement.
Another embodiment of the invention provides a kind of polymer dielectric film that can produce excellent fuel performance.
Another embodiment of the present invention provides a kind of fuel cell system that comprises improved polymer dielectric film.
Provide a kind of polymer dielectric film according to one embodiment of the invention, it comprises the polymeric matrix that contains the crosslinking curing oligomers and the nano level proton-conducting polymer particulate in the described polymeric matrix.
Provide a kind of fuel cell system according to another embodiment of the invention, it comprises generating element, to the fuel feeder of generating element fuel supplying and to the oxygenant feeder of generating element supply oxygenant.Described generating element comprises membrane electrode assembly and dividing plate, and described membrane electrode assembly comprises anode and the negative electrode that is aggregated the separation of thing dielectric film, and described dividing plate is positioned at each side of membrane electrode assembly.Generating element generates electricity by the electrochemical reaction of fuel and oxygenant.
Description of drawings
Fig. 1 is the indicative flowchart of expression making according to the process of the polymer dielectric film of one embodiment of the invention.
Fig. 2 is the synoptic diagram of expression according to the structure of the fuel cell system of one embodiment of the invention.
Fig. 3 A and 3B are respectively the SEM photos in cross section of the polymer dielectric film of expression embodiment 1 and comparative example 3.
Embodiment
The present invention relates to a kind of polymer dielectric film that is used for fuel cell.Describe embodiment as an example of the present invention below with reference to accompanying drawings in detail.
With reference to Fig. 1, polymer dielectric can have lower molecular weight by mixing equably, be that the curable oligomer of liquid and nano level proton-conducting polymer form dispersion and prepare (S1) in room temperature.Add reaction initiator to dispersion, the oligopolymer in the target mixture is by for example being crosslinked (S2) to dispersion irradiating electron beam or ultraviolet ray.
Now with an embodiment of the preparation process of illustration polymer dielectric film of the present invention.Yet when the illustration polymer dielectric film, the component of using in each step will be explained below.Because being used in the preparation process, initiator do not remain in the final polymer dielectric film, will be at this to its explanation in preparation process.
According to one embodiment of the invention, at first being blended in room temperature is the lower molecular weight curable oligomer and the nano level proton-conducting polymer of liquid, prepares uniform dispersion (S1).
According to an embodiment, curable oligomer and nano level proton-conducting polymer mix with 10: 90～90: 10 weight ratio.According to another embodiment, the weight ratio of mixture can be 30: 70～70: 30.
Proton-conducting polymer can be for solid-state or be made into the liquid that comprises solvent.The suitable solvent comprises methyl alcohol; Virahol; ethanol; alcohols such as n-propyl alcohol and butanols; N-N-methyl-2-2-pyrrolidone N-(NMP); dimethyl formamide (DMF); N,N-DIMETHYLACETAMIDE (DMA); tetrahydrofuran (THF) (THF); dimethyl sulfoxide (DMSO) (DMSO); acetone; methylethylketone (MEK); tetramethyl-urea; trimethyl phosphate; butyrolactone; isophorone; carbitol acetate; methyl iso-butyl ketone (MIBK); N-butylacetic acid ester; pimelinketone; Pyranton; diisobutyl ketone; ethyl ethanoyl acetic ester; glycol ether; propylene carbonate; vinyl carbonate; dimethyl carbonate; diethyl carbonate; deionized water and their mixture.According to an embodiment, can make the mixture of water and 2-propyl alcohol.
According to an embodiment, add reaction initiator to dispersion, cause the crosslinking reaction (S2) of oligopolymer and prepare polymer dielectric with electron beam or this dispersion of uviolizing subsequently.
The example of initiator comprises benzoyl peroxide, acetyl peroxide, dilauryl superoxide, Potassium Persulphate, as alkyl peroxides such as ditertiary butyl peroxide, chlormezanone, cumene hydroperoxy-, as peresters and azo-compounds such as TBPB tertiary butyl perbenzoate.Described azo-compound can be by RN=NR ' expression, and wherein R and R ' are CH 3, (CH 3) 3C, C 6H 5(CH 3CH), (C 6H 5) CH 2Perhaps (CH 3) 2(CN) C.
According to an embodiment, reaction initiator is being that the amount of 0.1～5 weight part is added in the dispersion with respect to 100 weight part curable oligomer.When using initiator, take place less crosslinked with the amount that is less than 0.1 weight part with respect to 100 weight part curable oligomer; And when consumption surpassed 5 weight parts, it is crosslinked that initiator can suppress, and residual as impurity.According to an embodiment, after polymer dielectric film was produced out and combines with catalyst layer, initiator caused oligopolymer and solidifies, subsequently by removing with sulfuric acid scrubbing.
In one embodiment, electron beam or ultraviolet irradiation can at room temperature carry out at kiln or dust free chamber.A sub irradiation prose style free from parallelism can be undertaken by being suitable for about 1kV electron beam or ultraviolet about 10 seconds.
In one embodiment, by the physics contact and the infiltration of the proton-conducting nanoparticle of adding with the amount of about 50wt%, Zhi Bei polymer dielectric film provides the ionic conductivity near the electrolyte matrix of the ionic conductivity of proton-conducting nanoparticle as mentioned above.Because polymer dielectric film can prepare by electron beam or uviolizing at short notice, the polymeric matrix that therefore constitutes polymer dielectric film can promptly be formed on the surface of electrode support.This point can improve the mass productivity of the membrane electrode assembly that is used for fuel cell.According to an embodiment, the thickness of polymer dielectric film is 30～80 microns.
Comprise the polymeric matrix that contains the crosslinking curing oligomers and the nano level proton-conducting polymer in this polymeric matrix according to the polymer dielectric film of an embodiment.
According to an embodiment, the curable oligomer that constitutes polymeric matrix comprises unsaturated functional group at each end of the chain of oligopolymer.The example of oligopolymer comprises by what following Chemical formula 1 was represented having 3～14 oxyethylene group (CH 2CH 2O-) polyethyleneglycol diacrylate.
Chemical formula 1
CR 1R 2＝CR 3COO(CH 2CH 2O) pCOCH＝CR 1R 2
R wherein 1, R 2And R 3All represent hydrogen or C independently 1～C 12Alkyl chain, p represents 3～14 integer.
According to an embodiment, the performance of polymer dielectric film can be regulated by selecting curable oligomer.For example, when polymer dielectric film needs snappiness, can use the oligopolymer (being that molecular weight is greater than 500) that has more than 9 oxyethylene groups.On the contrary, when polymer dielectric film needs excellent intensity, can use to have low-molecular-weight oligopolymer.
According to an embodiment, when curable oligomer and proton-conducting polymer nanoparticle uniform mixing, it can form netted polymeric matrix by crosslinking reaction, improves the dimensional stability of polymer dielectric film effectively, and the inhibited reaction thing passes through dielectric film.
According to an embodiment, based on the performance of expectation, curable oligomer can be that the amount of 10～90wt% is suitable for respect to the gross weight of polymer dielectric film.According to another embodiment of the invention, amount that can 20～80wt% is suitable for, and according to another embodiment, amount that can 30～70wt% is suitable for.When comprising the curable oligomer of the amount that is less than 10wt%,, thereby can not form reticulated structure because dilution effect can have relatively poor crosslinked ratio.Therefore, when being made into film, it can not keep dimensional stability.When the amount that comprises more than 90wt%, polymer dielectric film can have relatively poor ionic conductance.
According to an embodiment, polymeric matrix comprises the nano level proton-conducting polymer.Proton-conducting polymer can be fluorine class, fluorine-free or hydrocarbon polymer.
According to an embodiment, fluorine class proton-conducting polymer can be the ion exchange resin that has cation exchange group on its side chain, and described cation exchange group is selected from sulfonic group, carboxylic acid group, phosphate, phosphonate group and their derivative.In one embodiment, ion exchange resin has the ion exchange ratio of 3～33 scopes.In this manual, " ion exchange ratio of ion exchange resin " depends on carbonatoms and the cation exchange group number in the main polymer chain.This value is equivalent to about 500～2000 equivalents (EW).During described equivalent value is defined as and the weight of the needed acidic polymer of 1 normal alkali (NaOH).If equivalent is excessive, then the impedance meeting increases; And if it is too small, then mechanical property can worsen.Therefore, need the control equivalent value to keep the performance of expectation.
In one embodiment, the hydrogen (H) in the proton-conducting group of fluorine class proton-conducting polymer can be replaced by Na, K, Li, Cs or TBuA.When the H in the proton-conducting group of the end of proton-conducting polymer side chain is replaced by Na or TBuA, can use NaOH or tetrabutylammonium respectively.When H is replaced by K, Li or Cs, can use the suitable compound that is used to replace.Because this replacement is known in the art, omits detailed explanation.
In one embodiment, fluorine class proton-conducting polymer comprises perfluor base polymer or fluorine ether polymer.Example comprises poly-(perfluorinated sulfonic acid) (NAFION of following Chemical formula 2 TME.I.du Pontde Nemours Company), the Aciplex of following chemical formula 3 (Asahi Kasei Chemical), Flemion (Asahi Glass) and Fumion (commerce turns to Fumatech) fluorine carbon vinyl ether, and the vinyl ether fluorochemical of following chemical formula 4.At United States Patent(USP) Nos. 4,330,654,4,358,545,4,417,969,4,610,762,4,433,082,5,094,995, disclosed polymkeric substance also can utilize in 5,596,676 and 4,940,525, and the disclosure of these patents is incorporated at this by reference.
Chemical formula 2
Wherein, X is H, Li, Na, K, Cs, TBuA or NR 1R 2R 3R 4, R 1, R 2, R 3And R 4All represent H, CH independently 3Perhaps C 2H 5, m is more than or equal to 1, and n is that x is about 5～13.5 more than or equal to 2, and y is more than or equal to 1000.
Chemical formula 3
MSO 2?CFRfCF 2?O[CFYCF 2?O] n?CF＝CF 2
Wherein, Rf is fluorine or C 1～C 10Perfluoroalkyl, Y is fluorine or trifluoromethyl, n is 1～3 integer, M be selected from fluorine, hydroxyl, amino and-OMe (Me is basic metal base or quaternary ammonium group).
Chemical formula 4
Figure S061G0642320061207D000072
Wherein, k is 0 or 1,1 to be 3～5 integer.
In one embodiment, the perfluorinated sulfonic acid (NAFION of above-mentioned Chemical formula 2 TM) the sulfonic acid end group formed micellar structure by hydration, this structure can provide the proton shifting passage and be similar to typical water acid solution and play a role.
The example of fluorine-free proton-conducting polymer comprises benzoglyoxaline base polymer, polyimide base polymer, polyetherimide base polymer, polyphenylene sulfide base polymer, polysulfones-like polymer, polyether sulfone polymkeric substance, polyetherketone base polymer, polyether-ether-ketone polymer, polyphenylene quinoxaline polymkeric substance, polyethers polymkeric substance, polyphenylene oxide base polymer and poly-phosphine piperazine base polymer.The example more specifically of this fluorine-free proton-conducting polymer comprises polybenzimidazole, polyimide, polysulfones, polysulfones derivative, sulfonation poly-(ether ether ketone (s-PEEK)), polyphenylene oxide, polyphenylene sulfide, poly-phosphine piperazine and their mixture.
The example of hydro carbons proton-conducting polymer comprises the polystyrolsulfon acid polymkeric substance that is grafted on polyethylene, polypropylene, fluoroethylene polymer and the ethylene/tetrafluoroethylene polymkeric substance.
The example of proton-conducting polymer comprises perfluor base polymer, poly-polybenzimidazole base polymer and polysulfones-like polymer.According to an embodiment, preferred poly-(perfluorinated sulfonic acid ester).
According to one embodiment of the invention, proton-conducting polymer can be used alone or as a mixture.Described polymkeric substance can be that the amount of 10～90wt% is used with respect to the gross weight of polymer dielectric film, and this consumption depends on the performance that polymer dielectric film is desired.According to another embodiment of the invention, the amount that proton-conducting polymer can 20～80wt% and using, according to another embodiment, amount that can 30～70wt% and using.
In the polymer dielectric film according to embodiment of the present invention, the proton-conducting polymer nanoparticle can comprise solid-state or be dispersed in fluorine-free, hydro carbons or fluorine cationoid exchange resin particulate in deionized water and the alcoholic solvent.It can have the size of 10～200nm.According to another embodiment, it can have the size of 10～100nm.
When fluorine cationoid exchange resin was provided with minute quantity, polymer dielectric film may have relatively poor ionic conductivity.On the contrary, when being provided, may have relatively poor physical strength and relatively poor fuel gas (and/or liquid) separation performance with utmost point volume.
In addition, according to an embodiment, above-mentioned particulate can be formed by at least a polymkeric substance that is selected from by in the group of formations such as sulfonated polyimide class, SPSF class, poly-(ether ether ketone) class (s-PEEK), polybenzimidazole class (PBI) polymkeric substance.
In addition, according to an embodiment, the proton-conducting polymer nanoparticle can comprise segmented copolymer.Segmented copolymer can followingly be made: use hydrophilic monomer as the S-block, and use hydrophobic monomer as the F-block, it is copolymerized into two blocks (S-F) or three blocks (S-F-S or F-S-F) type block copolymer nano particulate, subsequently multipolymer is carried out sulfonation.In the embodiment of the preparation process of segmented copolymer, because outside block has same performance, multipolymer may be curled into the ring-type of similar necklace when making nanoparticle.Hydrophilic monomer can comprise having-CH 2CH 2The unitary polyethylene oxide of O-and having-CH 2C (ph) H-(wherein ph is a phenyl) unitary polystyrolsulfon acid (PSSA).Hydrophobic monomer can comprise having-CH 2C (C 5H 4N) the unitary Polyvinylpyrolidone (PVP) of H-and having-the unitary policapram of COCRHNH-.
According to one embodiment of the invention, polymer dielectric film may further include one or more additives, for example organic additive, inorganic additives or its combination.In one embodiment, the additive that provides is the agent of a kind of little powdered hydrophilic inorganic ionic conduction.Thereby when polymer dielectric film during in the Temperature Treatment that is higher than 100 ℃, moisture wherein can be evaporated, and it can prevent that proton-conducting from worsening.
In one embodiment, additive is dispersed in the polymer dielectric film as the powder with about 10～500nm diameter, thereby can increase the motor point and/or the humidification point of proton.In one embodiment, with respect to the whole polymer dielectric film of 100 weight parts, comprise the additive of the amount of 0.5～3 weight part.When content of additive was less than 0.5 weight part, it only produced unconspicuous effect to polymer dielectric; And when content surpassed 3 weight parts, it may have relatively poor physical strength.
In one embodiment, above-mentioned additive comprises the mineral ion transduction agent as the proton conduction agent.The example comprises phospho-wolframic acid, silicotungstic acid, phosphoric acid hydrogen zirconium, α-Zr (O A1PCH A2OH) a(O B1PC B2H B4SO B5H) bNH 2O, v-Zr (PO A1, H A2PO A3) a(HO B1PC B2H B3SO B4H) bNH 2O, Zr (O A1PC A2H A3) aY b, Zr (O A1PCH A2OH) aY bNH 2O, α-Zr (O A1PC A2H A3SO A4H) aNH 2O, α-Zr (O A1POH) H 2O, (P 2O 5) a(ZrO 2) bGlass, P 2O 5-ZrO 2-SiO 2Glass and their mixture.In above-mentioned formula, a1, a2, a3, a4, a, b1, b2, b3, b4, b5 and b all represent the integer of 0～14 scope independently, and n represents the integer of 0～50 scope.
In another embodiment, the proton conduction agent can be supported on the carrier according to the known method in the association area.In one embodiment, carrier can improve the mechanical property of proton conduction agent extraly, and it comprises Zeo-karb and inorganic additives.
Carrier can comprise silicon-dioxide (aerosil, trade(brand)name: Aerosil, Cabosil etc.), clay, aluminum oxide, mica or zeolite (trade(brand)name: SAPO-5, XSM-5, AIPO-5, VPI-5, MCM-41 etc.).The clay example comprises montmorillonite, saponite, hectorite, LAPONITE (laponite) or four silicon micas.
According to another embodiment of the invention, provide a kind of fuel cell system that comprises above-mentioned polymer dielectric film.Fuel cell system of the present invention comprises at least one generating element, fuel feeder and oxygenant feeder.
According to an embodiment, each generating element includes has the membrane electrode assembly that is arranged on each lateral dividing plate.It is by the also original generating of fuel oxidation and oxygenant.
According to an embodiment, each negative electrode and anode include electrode base material and catalyst layer.
Catalyst layer can comprise the platinum class catalyzer that is selected from the group that is made of platinum, ruthenium, osmium, platinum-ruthenium alloy, platinum-osmium alloy, platinum-palldium alloy, platinum-M alloy (wherein M is the transition element that is selected from Ga, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Sn, Mo, W, Rh and the combination thereof) and their mixture.According to an embodiment, anode and negative electrode can be made of same material.Yet in another embodiment about direct oxidation fuel cell, anode can comprise platinum-ruthenium alloy catalysts, with the poisoning of catalyst that prevents to cause owing to the CO that produces in reaction.More particularly, the limiting examples of platinum class catalyzer is selected from by in Pt, Pt/Ru, Pt/W, Pt/Ni, Pt/Sn, Pt/Mo, Pt/Pd, Pt/Fe, Pt/Cr, Pt/Co, Pt/Ru/W, Pt/Ru/Mo, Pt/Ru/V, Pt/Fe/Co, Pt/Ru/Rh/Ni, Pt/Ru/Sn/W and their group that constitutes.
This metal catalyst can adopt metal itself (black catalyzer), perhaps can be supported on the carrier.The carrier example comprises carbon material such as acetylene black, Deng Kahei (denka black), gac, Kai Qinhei (ketjen black) and graphite and inorganic particles such as aluminum oxide, silicon-dioxide, zirconium white or titanium oxide.In one embodiment, use carbon usually.
In one embodiment, catalyst layer can be by with suitable ratio mixed catalyst, tackiness agent and solvent, and mixture is coated on the electrode base material and forms.
The example of tackiness agent comprises the proton-conducting polymer that can bring into play the ionomer effect.The example of proton-conducting polymer comprises as fluorine type polymers such as perfluorinated sulfonic acid ester, polyamide polymers, polyethers polymkeric substance, benzoglyoxaline base polymer, polyimide base polymer, polyetherimide base polymer, polyphenylene sulfide base polymer, polysulfones-like polymer, polyether sulfone polymkeric substance, polyetherketone base polymer, polyether-ether-ketone polymer and polyphenylene quinoxaline polymkeric substance etc.Hydrogen in the ion-exchange group of proton-conducting polymer (H) can be replaced by Na, K, Li, Cs or TBuA.When the H in the ion-exchange group of the end of proton-conducting polymer side chain is replaced by Na or TBuA, in the process of preparation catalyst composition, can use NaOH or tetrabutylammonium respectively.When H is replaced by K, Li or Cs, can use the suitable compound that is used to replace.Because this replacement is known in the art, omits detailed explanation.
Adhesive resin can be used alone or as a mixture in one embodiment.Adhesive resin can be used with non-conducting polymkeric substance, to improve the binding property between polymer dielectric film and the catalyst layer.The consumption of adhesive resin can be adjusted based on the desired performance of polymer dielectric film.
The limiting examples of above-mentioned non-conducting polymkeric substance comprises polytetrafluoroethylene (PTFE), tetrafluoraoethylene-hexafluoropropylene copolymer (FEP), tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer (PFA), ethylene/tetrafluoroethylene (ETFE), ethylene-chlorotrifluoro-ethylene copolymer (ECTFE), polyvinylidene difluoride (PVDF), polyvinylidene difluoride (PVDF)-hexafluoropropylene copolymer (PVdF-HFP), Witco 1298 Soft Acid, Sorbitol Powder and their mixture.
The example of solvent comprises water, as alcohols, N-Methyl pyrrolidone, N,N-DIMETHYLACETAMIDE, dimethyl sulfoxide (DMSO), tetrahydrofuran (THF), acetone and their mixtures such as methyl alcohol, ethanol, Virahols.
Electrode base material is supported anode and negative electrode, and is provided for the passage to catalyst layer transfer the fuel and oxygenant.In one embodiment, electrode base material is made of for example carbon paper, carbon cloth, carbon felt or hardware cloth materials such as (porous-film of being made up of steel fiber or the lip-deep metallic membranes that is arranged on the cloth of being made up of polymer fiber).Yet described electrode base material also is limited to this.
In one embodiment, electrode base material can be processed into waterproof with fluorine-type resin, prevents because the water caused diffusional effect variation that produces in the fuel cell running.The example of fluorine-type resin comprises polyvinylidene difluoride (PVDF), tetrafluoroethylene, fluorinated ethylene propylene, polychlorotrifluoroethylene, fluoroethylene polymer and their mixture.
In one embodiment, between electrode base material and catalyst layer, can increase microporous layers to improve the reactant diffusional effect.Microporous layers is by comprising the conductive powder with specified particle diameter.The example of conductive of material comprises carbon dust, carbon black, acetylene black, gac, carbon fiber, soccerballene, nano-sized carbon and their mixture, but is not limited to this.The example of nano-sized carbon comprises carbon nanotube, carbon nanofiber, carbon nano thread, carbon nanohorn, carbon nano ring and their mixture.In one embodiment, microporous layers contains conductive powder, adhesive resin and solvent and forms by coating on electrode base material.The example of adhesive resin comprises tetrafluoroethylene, polyvinylidene difluoride (PVDF), polyvinyl alcohol and cellulose acetate, but is not limited to this.The example of solvent comprises as alcohols, water, N,N-DIMETHYLACETAMIDE, dimethyl sulfoxide (DMSO) and N-Methyl pyrrolidone such as ethanol, Virahol, n-propyl alcohol, butanols, but is not limited to this.
Coating process can comprise that silk screen print method, spraying method, scraper plate coating method, intaglio plate coating method, dip coating, silk screen cover method and japanning method, but is not limited to this.The method that adopts depends on the viscosity of composition.
With reference to the fuel cell system 1 of Fig. 2 description according to embodiment of the present invention.According to Fig. 2, fuel feeder 5 and oxygenant feeder 7 are to battery pile 15 fuel supplying and oxygenant.This battery pile comprises a plurality of generating elements 3, and its electrochemical reaction by fuel and oxygenant produces electric energy.
Fuel feeder 5 comprises jar 9 and the petrolift 11 of storing fuel, and it is to battery pile 15 fuel supplying.Oxygenant feeder 7 comprises pump 13, is used for to battery pile supply oxygenant.Fuel can comprise liquid state or gaseous hydrogen, as hydrocarbon fuel or Sweet natural gases such as methyl alcohol, ethanol, propyl alcohol, butanols.Oxygenant can comprise oxygen or air.Although illustration pump 11 and 13, the present invention is not limited to this structure, fuel cell system of the present invention comprises other structures, for example fuel and oxygenant are supplied to the structure of battery pile by diffusion.
Each generating element 3 includes: membrane electrode assembly 17, hydrogen oxide or fuel and reduction oxygenant; Dividing plate 19 and 19 ' is separately positioned on the opposite flank of membrane electrode assembly 17 fuel supplying and oxygenant.
The following examples in more detail illustration the present invention.Yet, should be understood that the present invention is not limited to these embodiment.
Embodiment 1
The 20wt%NAFION that 60g is commercially available TM/ H 2O (E.I.duPont de Nemour Inc., EW=1100: in Chemical formula 2, X is H, m=1, n=2, x is about 5～13.5, y is greater than 1000) proton-conducting polymer nanoparticle (100nm) dispersion soln and 0.82g NaOH and 9g polyethyleneglycol diacrylate (Aldrich, MW=742, p=14 in Chemical formula 1) mechanical stirring 6 hours at room temperature.Subsequently, in mixture after being mixed, add 0.9g chlormezanone, restir mixture 5 minutes.Final product is applied on the sheet glass, shines the 1kV ultraviolet ray subsequently and prepares polymer dielectric film.
Catalyst slurry is prepared as follows: respectively with 5wt%NAFION TM/ H 2O/2-propanol solution, 1M tetrabutylammonium/methyl alcohol dipropylene glycol and deionized water and Pt-Ru are black (black; catalyzer is not supported on the carrier; Johnson Matthey, HiSpec 6000) and Pt black (Johnson Matthey, HiSpec1000) particulate mixing.These slurries are coated on any side of polymer dielectric film, subsequently 200 ℃ with 500psi pressure hot pressing 3 minutes until 4mg/cm 2Load is placed anode and negative electrode.The NAFION that comprises the amount of 15wt% with respect to the catalyst weight in the catalyst layer TMThe trilamellar membrane electrode assemblie combines with the 31BC electrode base material (diffusion layer) that SGL Carbon Company makes and prepares five layer membrane electrode assemblies (MEA).
The MEA of preparation is inserted between two fiberglass blankets that are coated with tetrafluoroethylene, insert subsequently between two dividing plates with preformed gas and cooling channel, then compression comes manufacturing cell's battery between the copper end plate.After this elementary cell is injected into methyl alcohol and nitrogen, measure methanol cross-over electric current (cross-over current).In addition, after it is injected into methyl alcohol and ambient air, measure electric quantity change based on battery temperature and methanol concentration.
Comparative example 1
Handle 125 microns commercially available NAFION with 100 ℃ 3% superoxols and 0.5M aqueous sulfuric acid TM115 films 1 hour prepare polymer dielectric film with 100 ℃ deionized water wash subsequently.
Comparative example 2
Adopt the method same with comparative example 1, the commercially available Gore-Select film by 25 microns of pre-treatment prepares polymer dielectric film.
Comparative example 3
At room temperature stir the commercially available 5wt%NAFION of 100g TM/ H 2(SolutionTechnology Inc., EW=1100) solution is 48 hours, evaporating solvent and prepare about 5g NAFION for the O/2-propyl alcohol TMGel.Add the 95g N,N-DIMETHYLACETAMIDE and prepare 5wt%NAFION TM/ dimethylacetamide solution.The preheating 24 hours in 60 ℃ of dual vaporizers of this solution evaporates residual moisture.
5g polyvinylidene difluoride (PVDF) (Elf Atochem America, Inc., Kynar Flex 761) is dissolved in prepares 5wt% polyvinylidene difluoride (PVDF)/dimethylacetamide solution in the 95g N,N-DIMETHYLACETAMIDE.Subsequently, with the 5wt%NAFION of 20g polyvinylidene difluoride (PVDF)/dimethylacetamide solution and 50g preparation TM/ dimethylacetamide solution mixes.
Subsequently, adding 1g polyethyleneglycol diacrylate in mixing solutions (Aldrich, MW=742), and 50 ℃ of rapid stirrings 10 minutes.Then, in stirring 10 minutes mixture once more rapidly, add the 0.03g benzoyl peroxide.Adopt the scraper plate coating method final mixture to be coated on the surface of tetrafluoroethylene.
The film of preparation heats the composite polymer electrolyte membrane of making 30 microns of thickness in 12 hours in being maintained at about 100 ℃ baking oven.
Dielectric film according to 1～3 preparation of embodiment 1 and comparative example is measured ionic conductance by the impedance measuring method based on temperature, and comes Relative Humidity Measuring to change by the battery that being used to of using that BekkTech Company makes measured conductivity.The results are shown in the table 1.
In addition, according to the dielectric film of embodiment 1 and comparative example 1～3 preparation by following evaluation methanol permeability: the center that electrolyte membrane samples is arranged on two chambers diffusion battery, subsequently respectively at the mixing solutions and the deionized water of two ends circulations 15wt% methyl alcohol/deionizing, measure variations in refractive index and obtain the methanol concentration of infiltration.And then, by 5 * 5cm 2Dielectric film is the area increment rate of generation because moisture expands at room temperature, measures the area change of dielectric film.The results are shown in the following table 1.
Table 1
Thickness (μ m) Conductivity (S/cm) Conductivity (S/cm based on film thickness 2) Methanol permeability (cm 2/sec) Cubical expansivity (5M methyl alcohol) (%) 70 ℃ of electric quantity densities, 0.4V (mW/cm 2)
Embodiment 1 50 0.063 12.6 5.11×10 -7 ?15 115
Comparative example 1 125 0.082 6.56 2.03×10 -6 ?45 120
Comparative example 2 50 0.057 11.4 3.12×10 -5 ?14 85
Comparative example 3 50 0.041 8.2 7.21×10 -7 ?25 90
As shown in table 1, with the pure NAFION of comparative example 1 TMFilm is compared, though the polymer dielectric film of embodiment 1 has relatively poor ionic conductance, has the conductivity (S/cm of improvement 2), this is because physical strength is enhanced, thereby can be made into film.In addition, the pure NAFION of the polymer dielectric film of embodiment 1 and comparative example 1 TMFilm is compared has better dimensional stability and to the barrier of methyl alcohol.When under the same condition in 70 ℃ of whens running, it also has the elementary cell electric quantity density suitable with comparative example 1.And then the polymer dielectric film of embodiment 1 can in seconds form electrolyte matrix by the irradiation ultraviolet radiation crosslinked oligomers, thereby improved productivity is provided.
In addition, the polymer dielectric film of embodiment 1 has the dimensional stability suitable with the enhancing composite membrane of comparative example 2, but methanol permeability is lower than comparative example 2, and described comparative example 2 has too high methanol permeability.When 70 ℃ of runnings, it also has excellent elementary cell electric quantity density.
And then the polymer dielectric film of embodiment 1 is compared with comparative example 3 has better dimensional stability and lower methanol permeability, and when 70 ℃ of runnings, it also has excellent elementary cell electric quantity density.
Fig. 3 A and 3B are the SEM photos in cross section of representing the polymer dielectric film of embodiment 1 and comparative example 3 respectively.Shown in Fig. 3 A and 3B, at same NAFION TMUnder the content, because littler proton-conducting particle size and narrower distribution of sizes, compare with comparative example 3 according to the polymer dielectric film of embodiment 1 and to show the more section morphology of homogeneous.
As mentioned above, because the polymer dielectric film that is used for fuel cell of the present invention can be quick and easily manufactured, the present invention can provide polymer dielectric film with excellent productivity.In addition, the polymer dielectric film that is used for fuel cell of the present invention can be manufactured into film.Thereby the present invention can provide the polymer dielectric film with excellent size stability and hydro carbons barrier.
Although several embodiments of the present invention are shown and illustrate, those skilled in the art will appreciate that under the principle and spirit that does not deviate from claim and full scope of equivalents thereof and limited, can carry out various variations to these embodiment.

Claims (24)

1. fuel cell polymer dielectric film, it comprises the polymeric matrix of respectively holding the crosslinking curing oligomers with unsaturated functional group that contains at chain, in described polymeric matrix, has nano level proton-conducting polymer particulate, wherein, described curable oligomer has 3～14 oxyethylene groups in following Chemical formula 1
Chemical formula 1
CR 1R 2＝CR 3COO(CH 2CH 2O) pCOCH＝CR 1R 2
Wherein, R 1, R 2And R 3All be independently selected from hydrogen and the alkyl chain with 1～12 carbon atom, p is 3～14 integer,
With respect to the gross weight of polymer dielectric film, the amount of described curable oligomer is 10～90wt%, and the amount of described proton-conducting polymer is 10～90wt%.
2. polymer dielectric film according to claim 1, wherein, with respect to the gross weight of polymer dielectric film, the amount of described curable oligomer is 20～80wt%.
3. polymer dielectric film according to claim 2, wherein, with respect to the gross weight of polymer dielectric film, the amount of described curable oligomer is 30～70wt%.
4. polymer dielectric film according to claim 1, wherein, described proton-conducting polymer particulate comprises the polymkeric substance that is selected from the group that is made of fluorine class proton-conducting polymer nanoparticle, fluorine-free proton-conducting polymer nanoparticle, hydro carbons proton-conducting polymer nanoparticle and their mixture.
5. polymer dielectric film according to claim 4, wherein, described proton-conducting polymer particulate is included in the fluorine class proton-conducting polymer that side chain has cation exchange group, and described group is selected from the group that is made of sulfonic group, carboxylic acid group, phosphate and phosphonate group.
6. polymer dielectric film according to claim 4, wherein, described proton-conducting polymer particulate comprises and has 3～33 ion exchange ratio and 500～2000 normal fluorine class proton-conducting polymer.
7. polymer dielectric film according to claim 1, wherein, with respect to the gross weight of polymer dielectric film, the amount of described proton-conducting polymer is 20～80wt%.
8. polymer dielectric film according to claim 7, wherein, with respect to the gross weight of polymer dielectric film, the amount of described proton-conducting polymer is 30～70wt%.
9. polymer dielectric film according to claim 1, wherein, described proton-conducting polymer comprises sulfonated two or triblock copolymer, this multipolymer is made of hydrophilic monomer and hydrophobic monomer.
10. polymer dielectric film according to claim 1, wherein, described polymer dielectric film further comprises additive.
11. polymer dielectric film according to claim 10, wherein, described additive comprises the agent of hydrophilic inorganic ionic conduction.
12. polymer dielectric film according to claim 11, wherein, the agent of described hydrophilic inorganic ionic conduction comprises the material that is selected from the group that is made of following material: phospho-wolframic acid; Silicotungstic acid; Phosphoric acid hydrogen zirconium; α-Zr (O A1PCH A2OH) a(O B1PC B2H B4SO B5H) bNH 2O, wherein a1, a2, a, b1, b2, b4, b5 and b all represent 0～14 integer independently, n represents 0～50 integer; ν-Zr (PO A1, H A2PO A3) a(HO B1PC B2H B3SO B4H) bNH 2O, wherein a1, a2, a3, a, b1, b2, b3, b4 and b all represent 0～14 integer independently, n represents 0～50 integer; Zr (O A1PC A2H A3) aY b, wherein a1, a2, a3, a and b all represent 0～14 integer independently; Zr (O A1PCH A2OH) aY bNH 2O, wherein a1, a2, a and b all represent 0～14 integer independently, n represents 0～50 integer; α-Zr (O A1PC A2H A3SO A4H) aNH 2O, wherein a1, a2, a3, a4 and a all represent 0～14 integer independently, n represents 0～50 integer; α-Zr (O A1POH) H 2O, wherein a1 represents 0～14 integer; (P 2O 5) a(ZrO 2) bGlass, wherein a and b all represent 0～14 integer independently; P 2O 5-ZrO 2-SiO 2Glass and their mixture.
13. fuel cell system, it comprises generating element, to the fuel feeder of described generating element fuel supplying and to the oxygenant feeder of described generating element supply oxygenant, wherein, described generating element comprises membrane electrode assembly and is arranged on a pair of dividing plate on the opposite flank of described membrane electrode assembly, described membrane electrode assembly comprises polymer dielectric film and is arranged on anode and negative electrode on the opposite flank of described polymer dielectric film, and described polymer dielectric film comprises:
Contain the polymeric matrix that has the crosslinking curing oligomers of unsaturated functional group at the two ends of chain; And
Most nano level proton-conducting polymer particulates in described polymeric matrix,
Wherein, described curable oligomer has 3～14 oxyethylene groups in following Chemical formula 1,
Chemical formula 1
CR 1R 2＝CR 3COO(CH 2CH 2O) pCOCH＝CR 1R 2
Wherein, R 1, R 2And R 3All be independently selected from hydrogen and the alkyl chain with 1～12 carbon atom, p is 3～14 integer,
With respect to the gross weight of polymer dielectric film, the amount of described curable oligomer is 10～90wt%, and the amount of described proton-conducting polymer is 10～90wt%.
14. fuel cell system according to claim 13, wherein, with respect to the gross weight of polymer dielectric film, the amount of described curable oligomer is 20～80wt%.
15. fuel cell system according to claim 14, wherein, with respect to the gross weight of polymer dielectric film, the amount of described curable oligomer is 30～70wt%.
16. fuel cell system according to claim 13, wherein, described proton-conducting polymer comprises the polymkeric substance that is selected from the group that is made of fluorine class proton-conducting polymer, fluorine-free proton-conducting polymer, hydro carbons proton-conducting polymer and their mixture.
17. fuel cell system according to claim 16, wherein, described proton-conducting polymer is included in the fluorine class proton-conducting polymer that side chain has cation exchange group, and described group is selected from the group that is made of sulfonic group, carboxylic acid group, phosphate and phosphonate group.
18. fuel cell system according to claim 17, wherein, described fluorine class proton-conducting polymer has 3～33 ion exchange ratio and 500～2000 equivalent.
19. fuel cell system according to claim 13, wherein, with respect to the gross weight of polymer dielectric film, the amount of described proton-conducting polymer is 20～80wt%.
20. fuel cell system according to claim 19, wherein, with respect to the gross weight of polymer dielectric film, the amount of described proton-conducting polymer is 30～70wt%.
21. fuel cell system according to claim 13, wherein, described proton-conducting polymer comprises sulfonated two or triblock copolymer, and this multipolymer is made of hydrophilic monomer and hydrophobic monomer.
22. fuel cell system according to claim 13, wherein, described polymer dielectric film further comprises additive.
23. fuel cell system according to claim 22, wherein, described additive comprises the agent of hydrophilic inorganic ionic conduction.
24. fuel cell system according to claim 23, wherein, the agent of described hydrophilic inorganic ionic conduction comprises the material that is selected from the group that is made of following material: phospho-wolframic acid; Silicotungstic acid; Phosphoric acid hydrogen zirconium; α-Zr (O A1PCH A2OH) a(O B1PC B2H B4SO B5H) bNH 2O, wherein a1, a2, a, b1, b2, b4, b5 and b all represent 0～14 integer independently, n represents 0～50 integer; ν-Zr (PO A1, H A2PO A3) a(HO B1PC B2H B3SO B4H) bNH 2O, wherein a1, a2, a3, a, b1, b2, b3, b4 and b all represent 0～14 integer independently, n represents 0～50 integer; Zr (O A1PC A2H A3) aY b, wherein a1, a2, a3, a and b all represent 0～14 integer independently; Zr (O A1PCH A2OH) aY bNH 2O, wherein a1, a2, a and b all represent 0～14 integer independently, n represents 0～50 integer; α-Zr (O A1PC A2H A3SO A4H) aNH 2O, wherein a1, a2, a3, a4 and a all represent 0～14 integer independently, n represents 0～50 integer; α-Zr (O A1POH) H 2O, wherein a1 represents 0～14 integer; (P 2O 5) a(ZrO 2) bGlass, wherein a and b all represent 0～14 integer independently; P 2O 5-ZrO 2-SiO 2Glass and their mixture.
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